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Acquisition, Dispositions, Goodwill and Other Intangible Assets (Goodwill) (Details) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2017 USD ($)
Goodwill [Line Items] |
Goodwill - Beginning Balance | $ 27,059
Goodwill Resulting from Business Combinations | 113
Goodwill - Foreign Currency Translation and Other | 744
Goodwill - Ending Balance | 27,916
Otis [Member] |
Goodwill [Line Items] |
Goodwill - Beginning Balance | 1,575
Goodwill Resulting from Business Combinations | 3
Goodwill - Foreign Currency Translation and Other | 114
Goodwill - Ending Balance | 1,692
UTC Climate, Controls & Security [Member] |
Goodwill [Line Items] |
Goodwill - Beginning Balance | 9,487
Goodwill Resulting from Business Combinations | 110
Goodwill - Foreign Currency Translation and Other | 443
Goodwill - Ending Balance | 10,040
Pratt & Whitney [Member] |
Goodwill [Line Items] |
Goodwill - Beginning Balance | 1,511
Goodwill Resulting from Business Combinations | 0
Goodwill - Foreign Currency Translation and Other | 0
Goodwill - Ending Balance | 1,511
UTC Aerospace Systems [Member] |
Goodwill [Line Items] |
Goodwill - Beginning Balance | 14,483
Goodwill Resulting from Business Combinations | 0
Goodwill - Foreign Currency Translation and Other | 187
Goodwill - Ending Balance | 14,670
Total Segments [Member] |
Goodwill [Line Items] |
Goodwill - Beginning Balance | 27,056
Goodwill Resulting from Business Combinations | 113
Goodwill - Foreign Currency Translation and Other | 744
Goodwill - Ending Balance | 27,913
Eliminations and other [Member] |
Goodwill [Line Items] |
Goodwill - Beginning Balance | 3
Goodwill Resulting from Business Combinations | 0
Goodwill - Foreign Currency Translation and Other | 0
Goodwill - Ending Balance | $ 3

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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